Gaya APA
Collins Cobuild English Usage. (2004).
Westerhill Road:
HarperCollins Publisher.
Gaya Chicago
Collins Cobuild English Usage.
.
Westerhill Road:
HarperCollins Publisher,
2004.
Text.
Gaya MLA
Collins Cobuild English Usage.
.
Westerhill Road:
HarperCollins Publisher,
2004.
Text.
Gaya Turabian
Collins Cobuild English Usage.
Westerhill Road:
HarperCollins Publisher,
2004.
Print.